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From: Ronald Garcia (garcia_at_[hidden])
Date: 2008-05-16 17:45:49

Review Wizard Status Report for May 2008


December 7, 2007 - Forward Library Accepted - Awaiting SVN

December 16 - Unordered Containers Library Accepted - In SVN

December 21 - Factory Library Accepted - Awaiting SVN

January 13, 2008 - Switch Library Accepted Provisionally - Awaiting
submission for
mini review

January 18 - Singleton Library Rejected - Awaiting resubmission, John
has already volunteered to manage the next review

January 30 - Flyweight Library Accepted - Awaiting SVN

February 13 - Logging Library Rejected - Awaiting resubmission for new
review, John Torjo has already resubmitted and Gennadiy Rozental has
volunteered to manage the review

February 27 - Floating Point Utilities Library Accepted - Awaiting SVN

March 14 - Proto Library Accepted - Exists as a component in
Xpressive, but
not yet as a separate library

April 20 - Egg review completed - Results pending

May 7 - Scope Exit Library Accepted - Awaiting SVN

Older Issues

The binary_int library, accepted in October 2005 has not yet been
to SVN. The authors are strongly encouraged to contact the review

The Quantitative Units library, accepted in April 2007 has not yet been
submitted to SVN

The Globally Unique Identifier library, accepted provisionally in May
has not yet been submitted for mini-review and full acceptance

The Time Series Library, accepted in August 2007 has not yet been
to SVN

The Accumulators library, accepted in February 2007 is in SVN

The Exception library, accepted in October 2007 is in SVN

The Scope Exit review report had not been submitted by the review
manager. John Phillips stepped in as substitute review manager and
produced a report

For libraries that are still waiting to get into SVN, please get them
ready and into the repository. The developers did some great work
making the libraries, so don't miss the chance to share that work with
others. Also notice that the review process page has been updated with
a section on rights and responsibilities of library submitters.

For the Scope Exit review, we would like to publicly apologize to
Nasonov for how long this has languished without a report. The review
wizards will work to make sure this doesn't happen any more.

General Announcements

As always, we need experienced review managers. In the past few
months there
have been a large number of reviews, but the flow of high quality
submissions is just as big, so manage reviews if possible and if not
make sure to watch the review schedule and participate. Please take a
at the list of libraries in need of managers and check out their
descriptions. In general review managers are active boost
participants or
library contributors. If you can serve as review manager for any of
email Ron Garcia or John Phillips, "garcia at cs dot indiana dot edu"
"phillips at mps dot ohio-state dot edu" respectively.

A link to this report will be posted to If you would
like us
to make any modifications or additions to this report before we do that,
please email Ron or John.

If you're a library author and plan on submitting a library for
review in the
next 3-6 months, send Ron or John a short description of your library
we'll add it to the Libraries Under Construction below. We know that
are many libraries that are near completion, but we have hard time
track all of them. Please keep us informed about your progress.

Review Queue

* Finite State Machines
* Property Map (fast-track)
* Graph (fast-track)
* Lexer
* Thread-Safe Signals
* Boost.Range (Update)
* Shifted Pointer
* DataFlow Signals
* Logging
* Futures (Braddock Gaskill)
* Futures (Anthony Williams)
* Join (Yigong Liu)
* Pimpl (Vladimir Batov)


Finite State Machines
:Author: Andrey Semashev
:Review Manager: Martin Vuille
:Download: `Boost Sandbox Vault <>`__


   The Boost.FSM library is an implementation of FSM (stands for
   Finite State Machine) programming concept. The main goals of the
   library are:

   * Simplicity. It should be very simple to create state machines using
     this library.
   * Performance. The state machine infrastructure should not be
     very time and memory-consuming in order to be applicable in
     more use cases.
   * Extensibility. A developer may want to add more states to an
     existing state machine. A developer should also be able to
     specify additional transitions and events for the machine with
     minimum modifications to the existing code.

Property Map (fast-track)
:Author: Andrew Sutton
:Review Manager: Jeremy Siek
   A number of additions and modifications to the Property Map Library,

   * A constant-valued property map, useful for naturally unweighted
   * A noop-writing property map, useful when you have to provide an
     argument, but just don't care about the output.
   * See
     `ChangeLog <
     for details.

Graph (fast-track)
:Author: Andrew Sutton
:Review Manager: Jeremy Siek
  A number of additions and modifications to the Graph Library,

  * Two new graph classes (undirected and directed) which are intended
    to make the library more approachable for new developers
  * A suite of graph measures including degree and closeness
    centrality, mean geodesic distance, eccentricity, and clustering
  * An algorithm for visiting all cycles in a directed graph (Tiernan's
    from 1970ish). It works for undirected graphs too, but reports
    twice (one for each direction).
  * An algorithm for visiting all the cliques a graph (Bron&Kerbosch).
    Works for both directed and undirected.
  * Derived graph measures radius and diameter (from eccentricity) and
    girth and circumference (from Tiernan), and clique number (from
  * An exterior_property class that helps hides some of the weirdness
    with exterior properties.
  * run-time and compile-time tests for the new algorithms.
  * a substantial amount of documentation
  * Graph cores, implemented by David Gleich (@Stanford University)
  * Deterministic graph generators - capable of creating or inducing
    specific types of graphs over a vertex set (e.g., star graph, wheel
    graph, prism graph, etc). There are several other specific types
    could be added to this, but I haven't had the time just yet.

:Author: Ben Hanson

:Review Manager: Eric Neibler

:Download: `Boost Sandbox Vault <


   A programmable lexical analyser generator inspired by 'flex'.
   Like flex, it is programmed by the use of regular expressions
   and outputs a state machine as a number of DFAs utilising
   equivalence classes for compression.

Thread-Safe Signals
:Author: Frank Hess

:Review Manager: Need Volunteer

:Download: `Boost Sandbox Vault <

:Description: A thread-safe implementation of Boost.Signals that
   has some interface changes to accommodate thread safety, mostly with
   respect to automatic connection management.

Boost.Range (Update)
:Author: Neil Groves

:Review Manager: Needed

:Download: `Boost Sandbox Vault <

:Description: A significant update of the range library, including
  range adapters.

Shifted Pointer
:Author: Phil Bouchard

:Review Manager: Needed

:Download: `Boost Sandbox Vault <

:Description: Smart pointers are in general optimized for a specific
  resource (memory usage, CPU cycles, user friendliness, ...) depending
  on what the user need to make the most of. The purpose of this smart
  pointer is mainly to allocate the reference counter (or owner) and
  the object itself at the same time so that dynamic memory management
  is simplified thus accelerated and cheaper on the memory map.

DataFlow Signals
:Author: Stjepan Rajko

:Review Manager: Needed


:Description: Dataflow is a generic library for dataflow programming.
  Dataflow programs can typically be expressed as a graph in which
  represent components that process data, and edges represent the
flow of data
  between the components. As such, dataflow programs can be easily
  reconfigured by changing the components and/or the connections.

:Author: John Torjo

:Review Manager: Gennadiy Rozental


   Used properly, logging is a very powerful tool. Besides aiding
   debugging/testing, it can also show you how your application is
   used. The Boost Logging Library allows just for that, supporting
   a lot of scenarios, ranging from very simple (dumping all to one
   destination), to very complex (multiple logs, some enabled/some
   not, levels, etc). It features a very simple and flexible
   interface, efficient filtering of messages, thread-safety,
   formatters and destinations, easy manipulation of logs, finding
   the best logger/filter classes based on your application's
   needs, you can define your own macros and much more!

:Author: Braddock Gaskill

:Review Manager: Needed


:Description: The goal of the boost.future library is to provide a
  future implementation with the best features of the numerous
  implementations, proposals, and academic papers floating around, in
  hopes to avoid multiple incompatible future implementations in
libraries of
  related concepts (coroutines, active objects, asio, etc). This
library hopes
  to explore the combined implementation of the best future concepts.

:Author: Anthony Williams

:Review Manager: Needed

n2561_future.hpp (code)
n2561.html (description)


  This paper proposes a kind of return buffer that takes a
  value (or an exception) in one (sub-)thread and provides the value in
  another (controlling) thread. This buffer provides essentially two

   * an interface to assign a value as class promise and

   * an interface to wait for, query and retrieve the value (or
     from the buffer as classes unique_future and shared_future.
While a
     unique_future provides move semantics where the value (or
     can be retrieved only once, the shared_future provides copy
     where the value can be retrieved arbitrarily often.

  A typical procedure for working with promises and futures looks like:

   * control thread creates a promise,
   * control thread gets associated future from promise,
   * control thread starts sub-thread,
   * sub-thread calls actual function and assigns the return value to
the promise,
   * control thread waits for future to become ready,
   * control thread retrieves value from future.

  Also proposed is a packaged_task that wraps one callable object and
  provides another one that can be started in its own thread and assigns
  the return value (or exception) to a return buffer that can be
  accessed through one of the future classes.

  With a packaged_task a typical procedure looks like:

   * control thread creates a packaged_task with a callable object,
   * control thread gets associated future from packaged_task,
   * control thread starts sub-thread, which invokes the packaged_task,
   * packaged_task calls the callable function and assigns the return
   * control thread waits for future to become ready,
   * control thread retrieves value from future.

Notice that we are in the unusual position of having two very
different libraries with the same goal in the queue at the same
time. The Review Wizards would appreciate a discussion of the best way
to hold these two reviews to produce the best possible addition to


:Author: Yigong Liu
:Review Manager: Needed
:Description: Join is an asynchronous, message based C++ concurrency
  library based on join calculus. It is applicable both to
  multi-threaded applications and to the orchestration of asynchronous,
  event-based applications. It follows Comega's design and
  implementation and builds with Boost facilities. It provides a high
  level concurrency API with asynchronous methods, synchronous methods,
  and chords which are "join-patterns" defining the synchronization,
  asynchrony, and concurrency.
:Author: Vladimir Batov
:Review Manager: Needed
:Download: `Boost Sandbox Vault < 
:Description: The Pimpl idiom is a simple yet robust technique to
  minimize coupling via the separation of interface and implementation
  and then implementation hiding.  This library provides a convenient
  yet flexible and generic deployment technique for the Pimpl idiom.
  It's seemingly complete and broadly applicable, yet minimal, simple
  and pleasant to use.
Libraries under development
Please let us know of any libraries you are currently
developing that you intend to submit for review.

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